Place broccoli, red and yellow peppers and onion in a 3-quart casserole; cover with lid or vented plastic wrap. Stirring midway through cooking, microwave on high 5 minutes. Place shrimp on top of vegetables. Place marmalade, garlic and ginger root in a 2-cup glass measure. Microwave on high 40 seconds, or until marmalade melts. Pour over shrimp; re-cover. Stirring midway through cooking. microwave on high 4-5 minutes.